I'm slightly new to simulations and need to have a basic understanding about the monte-carlo runs.
All I know is after a specified number of monte runs, we get a mean and a sigma value and depending upon the sigma level(n), we get a value of [mean - n*sigma]

Now, what I want to understand is, is my device good, if I'm getting a negative value of the expression above because in that case sigma would be minimum. If any of you has any related doc,please forward.